Here is the ultimate guide how to circumvent the fact that Armory does not run on MacOS.

You need an Armory seed for that.

1. Install the trial version of Parallels, and Windows in it. One click, and for free.
2. Install the Windows version of Armory within Parallels.
3. Access the wallet using your seed, then move your coins elsewhere.

Closed Source repaired the mess Open Source left me with. (I leave the obvious and not so obvious conclusions from that to the community...)